Water-tube boiler.



No. 738,377. PATENTED SEPT. 8, 1903.

F. R. TIBBITTS. WATER TUBE BOILER.

APPLIOATION FILED JULY 31, 1901. N0 MODEL.

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No. 738.377. PATENTED SEPT. 8, 1903.

F. R. TIBBITTS. WATER TUBE BOILER.

APPLICATION FILED JULY 31. 1901.

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PATENTED SEPT. 8, 1903.

F. R., IIIBBITTS.

WATER, EUBE BOILER.

APPLIOATLQN FILED JULY 31.1901.

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PATENTED SEPT. 8, 1903.

F. R. TIBBITTS. WATER TUBE BOILER. APPLIOATION FILED JULY 31. 190i.

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UNITED STATES Patented September 8, 1903.

FRANK R. TIBBITTS, OF ERIE, PENNSYLVANIA.

WATER-TUBE BOILER.

SPECIFICATION formingpart of Letters Patent No. 738,377, dated September 8, 1903.

Application filed July 31,1901. Serial No. 70,389. (No model.)

To all whom it may concern.-

Be it known that I, FRANK R. TIBBITTS, a citizen of the United States of America, and

aresident of the city of Erie, county of Erie,

State of Pennsylvania, have invented certain new and useful Improvements in Water-Tube Boilers, of which the following is a specifica tion.

This invention relates to water-tube boilers for the generation ofsteam; and it consists in the new and novel constructions and combinations of the elements comprising such mechanisms, substantially as hereinafter described, and pointed out in the claims.

The invention has for its objects to provide for perfect combustion of the fuel and its products, for perfect and free circulation of the water in the tubes, for the utilization of the escaping heat and gases for heating and purifying the feed-water, and in providing an induced draft, and in other features of improvement. For accomplishing these obj ects Iconstruct the steam-generator on a new plan, having nearly-vertical tubes with a steam-drum at the top and a mud-drum at the lower ends of said tubes and support the same in a new housing of peculiar construction. I also provide horizontal baffles therein, whereby the currents of heat from the furnace pass transversely to the circulation of the water in the tubes. I also provide a feedwater heater and purifier where the escaping heat and gases enter the chimney for the utilization of said usually wasted heat. I also provide an induced draft by attaching a fan at the entrance to the chimney, whereby the comrningling and consumption of the gases and fuel is uniform and steady and which also enables the employment of a low chimney, thus obviating the necessity of a tall stack.

The nature and performance of this improvement willfully appear when considered in connection with the accompanying drawings, in which Sheet 1,Figure l, is a side elevation of my new boiler, showing the new construction of.

the housing. Sheet 2, Fig. 2, is a vertical section of the same, showing the interior construction of all the parts. Sheet 3, Fig. 3, is a vertical cross-section of the same. Sheet 4, Figs. 4:, 5, 6, 7, 8, are details of the steam and mud drum construction.

D, the purpose of which is to provide right angle connections for the tubes to said sheets as the drums are set in a horizontal position,

while the tubes are to be at a little inclination therewith, as seen in Fig. 2. This places the tubes partly over the furnace and provides for the position of the mud-drum back of and below the fire-line and also furnishes adequate room for a feed-water heater and purifier over the tubes and at the chimney-entrance.

The next feature of the invention consists in the construction of the housing or setting and the baffles for said boiler, described as follows:

E E represent the walls of the housing.

F F are angle-iron posts or columns, supported on suitable foundations and are joined by horizontal beams G G, the top beam resting on the top of the columns. These form a framework for the walls of brick, which are lined with fire-brick. Brackets g g on the drums, resting on the top and lower beams, provide for ample supportfor the boiler. Gross-beams HH,resting on the middle beams G G, make supports for the horizontal baffles I I. The lower baffle extends from the front wall nearly through the rows of tubes, and the upper baffle extends from the rear wall nearly through the rows of tubes, thus providing for a circuitous course for the currents of heat through the rows of tubes back and forth from the furnace to their upper parts, as shown by the arrows.

The next feature of the invention is the construction and adaptation of a feed-water heater and purifier in combination with the boiler, described as follows:

K is a coil of pipes supported over the upper baffle back of the steam-drum and. upper ends of the tubes and to be connected from their top part with the inlet-pipe L, leading in through the rear wall and into the top of mud-drum, the lower part of said coil of pipe to be connected to a feed -pump. (Not shown.)

This feed-water heater and purifier thus located near the chimney and taking heat'and gases after they have passed the tubes serves to utilize such heat, that usually goes to waste.

The next feature of the invention consists in the employment of an induced draft constructed and adapted to operate as follows:

M is a rotary fan connected to a box N at the back of the feed-water heater and purifier and discharging into a low chimney 0. By this means the draft of the furnace is increased and the commingling and combustion is made uniform and complete and requires no tall smoke-stack.

The furnace shown is the endless-chain grate, the subject of my Patents No. 670,257, March 19, 1901, and No. 670,694, March 26, 1901; but an ordinary grate-bar furnace may be employed.

In the top of the steam-drum are provided manholes for the convenience of inserting, cleaning, and repairing tubes. In the walls of the housing are provided doors for convenience of access to the interior for the purpose of repairs, &c.

The advantages of these improvements are obviously simplicity of construction and operation, ease of access for repairs, &c., and efficiency of combustion and circulation, resulting in great economy.

Having described my invention, what I claim is 1. In water-tube boilers, a boiler consisting of a steam-drum and a mud-drum, each having a corrugated tube-sheet, and substaii-- tially vertical tubes connecting said drums, in combination with a housing composed of an iron framework and brick walls, horizontal batfles in said housing and intersecting the tubes, substantially as described.

2. In water-tube boilers, a boiler consisting of a steam-drum and a mud-drum, each having a corrugated tube-sheet,and substantially vertical tubes connecting said drums, in combination with a housing, composed of an iron framework and brick walls, horizontal baffles in said housing and intersecting the tubes and a feed-Water heater and purifier located over the upper baffle and back of the tubes, substantially as described.

3. In water-tube boilers, a boiler consisting of a steam-drum and a mud-drum, each having a corrugated tube-sheet, and substantially vertical tubes connecting said drums, in combination with a housing composed of an iron framework and brick walls supporting said boiler, horizontal baffles in said housing, a feed-Water heater and a fan intermediate of the housing and a chimney, for producing an induced draft, substantially as described.

Signed by me at Erie, Pennsylvania, this 27th day of July, 1901.

FRANK R. TIBBITTS.

Witnesses:

H. A. STRONG, GEO. B. TIBBITTS. 

